Fidelity balance in quantum operations.
暂无分享,去创建一个
I derive a tight bound between the quality of estimating the state of a single copy of a d-level system, and the degree the initial state has to be altered in the course of this procedure. This result provides a complete analytical description of the quantum mechanical trade-off between the information gain and the quantum state disturbance expressed in terms of mean fidelities. I also discuss consequences of this bound for quantum teleportation using nonmaximally entangled states.
[1] Kendall E. Atkinson. An introduction to numerical analysis , 1978 .